A reduction of 21% in the price of pulse enables a person to by 10.5 kg more for Tk. 100. How much is reduced per kg of pulse?
A
Tk 2.50
B
Tk 2.25
C
Tk 2
D
Tk 2.30
Correct Answer: Tk 2
ধরি, original দাম = x Tk per kg reduced দাম = 79x/100 Tk per kg তাহলে, 100/(79x/100) - 100/x = 10.5 10000 - 7900 = 10.5 × 79x x = 2100/(10.5×79) তাহলে, required price = 79/100×2100/(10.5×79) = 2 Tk per kg